The invention refers to an RF front-end (100) adapted to perform either in a receiving mode or in a transmitting mode and adapted to receive or transmit signals located in at least two separated frequency bands, respectively comprising an input and an output and further comprising an input matching circuit (1) comprising a first input coupled to the input of the RF front-end (100), an output matching circuit (2) coupled to the output; the input matching circuit (1) being coupled to the output matching circuit (2) via respective first amplifier (3) and second amplifier (4), and a phase shifter (5) coupled either to the input of the RF front-end (100) in a receiving mode, or to the output of the RF front-end (100) in a transmitting mode.